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Hayward police on Monday announced the arrest of a 29-year-old Catholic afterschool aide after allegedly having a two-year relationship with an underage boy. Cheryl Hurd reports. (Published Monday, Dec 9, 2013)

Updated at 5:37 AM PST on Tuesday, Dec 10, 2013

Hayward police on Monday announced the arrest of a 29-year-old Catholic afterschool aide after allegedly having a two-year relationship with a then-12-year-old boy who was a student at the school.

Sgt. Ken Forkus said police arrested Mia Amalia Cummings, an aide at All Saints Catholic School, on Nov. 26 on suspicion of molesting a now-graduated student from December 2011 to Jan. 30, 2012.

Cummings was formally charged on Dec. 2 on eight felony counts of lewd acts with a child. She is currently in custody at the Alameda County Jail. Her bail has been set at $800,000.

Mike Brown, a spokesman for the Oakland Diocese, which oversees the school, said Cummings is on paid leave after having been hired in 2005 as a part-time aide after school, mostly setting up events. She passed all the criminal background checks required of the job.

Charging documents allege that five of the alleged sex acts occurred in the school's kitchen, and at least one of them occurred in her Oakland apartment.

Forkus told NBC Bay Area on Monday that police waited so long to announce the charges because they were looking for other victims, and after several weeks, didn't come up with any.

Police got a tip from a state mandated reporter on Nov. 18 that there was a possible sexual child abuse case to look into.

Investigators determined that when she was 27 years old, Cummings had been allegedly involved in a sexual relationship with the student since he was 12. He is now 14 and has since gone to high school. The two often texted and called each other, according to charging documents.

At the time, she worked as an afterschool program assistant, police said.

Attempts to locate Cummings' attorney also weren't immediately successful. One parent on the school who didn't want to be identified said Cummings was "nice."

On Cummings' Facebook page, she lists her city of residence as Oakland and originally came from Oktaha, Oklahoma.

Police said that All Saints Catholic School administration cooperated with this investigation.